Jean pierre serve



(No Model.) 2 Sheets--Sheet 1.

J. P. SERVE. LOGOMOTIVE DRAFT DEVICE. No. 498,034. Patented May 23, 1893.

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No. 498,084. Patented May 23, 1893.

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UNITED STATES PATENT OFFICE.

JEAN PIERRE SERVE, OF OALUIRE ET OUIRE, FRANCE.

LOCOMOTIVE DRAFT DEVICE.

SPECIFICATION forming part of Letters Patent No. 498,034, dated May 23, 1893.

Application filed August 20, 1892. $erial No. 443,570. (No model.)

To all whom it ntcty concern:

Be it known that l, JEAN PIERRE SERVE, engineer, a citizen of the Republic of France, residing at Ualuire et Ouire, in the Department of Rhone, in the Republic of France, have invented certain new and useful Improvements in Locomotive Draft Devices, of which the following is a specification.

The invention is relative to the blowers employed for elfecting the forced draft in locomotives, and it has for its object to secure this result in a simple and practical manner.

I am aware that, for the object of being able to promote, at will, the combustion of the furnace of steam boilers of all kinds, there have been employed blowers drawing the gases produced by combustion, but the arrangement-s proposed were not practicallyapplicable to locomtives.

My invention consists essentially in the particular position and the means of mounting and controlling one or several blowers drawing by their center the hot gases of the smoke box and projecting them into the chimney or into any other suitable place according to the object which may be proposed.

The invention will be completely described with reference to the annexed drawings, in which Figure 1 is a vertical section showing the smoke box of a locomotive furnished with two blowers mounted on a hollow axle traversed by a current of water. Fig. 2 is a vertical section showing a modification of the preceding arrangement in which the axle of the blowers is cooled bya current of air. Figs.

3 and 4 are views in section to a larger scale of the turbine mounted at the extremities of the axle of the blowers. Fig. 5 is a view in elevation showing the employment of a single blower actuated by means of a motor placed near to the furnace of the locomotive. Fig. 6 is a transverse section of this same arrangement. Fig. 7 is a view in elevation showing a modification of the control of the blowers.

On referring to the drawings and specially to Figs. 1, 2 and 6, it will be seen that the system consists essentially in arranging on one or two sides of the smoke box of the locomotive, one or two drawing blowers and in actuating them by means of one or several motors independent of the motor of the locomotive, and finally in fixing and in cooling in a special manner the axle of these blowers.

On Fig. 1, two vertical blowers V V communicating by their center with the smoke box B of the locomotive A, draw the hot gases on their exit from the tubes and crowd them by means of the curved conduits D into the chimney G which is furnished at its lower part with a valve E intended to prevent the return of air during the working of the blowers, but which a person can open when these apparatuses are not being made use of. The two blowers V V are mounted on a common axle F which is by preference formed in two parts connected in their middlein a supple manner so as to permit of the lateral play necessary for preventing stiltness in the bearings. On the drawings I have shown the employment of two disks f connected at their periphery, any other equivalent arrangement can be employed for this object.

With the object of avoiding the heating of the axle F, this axle is hollow and constantly cooled by a strong current of cold water, to effect this one of its extremities is placed in communication by a tuyere 6 with the tender of the locomotive, and its other extremity carries a little turbine d represented in section, to a larger scale, in Figs. 5 and 6, and the central part of which communicates with the central part of the axle F, while its periphery communicates with the tender by means of the tuyere e. This turbine, while turning, aifords in the interior of the axle F a very active circulation of water which prevents it from becoming heated and secures efficiency in the lubrication of its bearings b b. This circulation of water could be equally produced by means of a pump, or by an injector placed in a manner that the cold water which it draws through into the tender passes at first in the hollow axle F. It will be understood finally that in place of cooling the axle, the bearings of this axis could be cooled by means of a circulation of water obtained in one of the manners above indicated.

With a View of rendering the action of the blowers independent of the progress of the locomotive, the axle F is operated by means of one or two motors M M, of the brotherhood kind, any other kind of rotary or other machine, may be employed for the same ObJBOt.

In the variety shown in Fig. 2, the motors M M actuate an intermediate axle h which operates the axis F by means of a cog wheel and pinion, which permits of giving to the blowers a great rotary speed without increasing that of the motors M M. In this modification, the cooling of the axle F is obtained by means of a current of cold air; for this purpose the axle F is pierced at its extremit es with holes communicating with the exterior air, and in its middle it communicates by means of other holes f applied inthe part f or in any other place, with the interior 'of the smoke box B "where the blowers produce 3 a relative vacuity; in this manner there is es- 5 tablished in the interior of the axle a rapid circulation of cold air in the direction indicated by the arrows.

In themodification shown in Figs. '5-a'nd 6, l I have shown the employment of a single drawing blower V placed at the "side "of the i smoke box B, a'ndthe cooling of the "axle is produced likewise by the action of this blower. With this object, the rods Q; which Garry the wings of the blower V are hollow, and communicate with the interior of the boi low a'xle 'F, the other'ext'remityof which'op'ens in the free air, so that there is thus est ablished a circulation of cold air in the dimetion of the arrows. In this arrangement, I have indicated the "employment offan ind'ependent motor 'M' placed near to the driven and actuating the blower by me ns or trans- 5 mission pulleys P P P P and of straps "G.

In the modification shown in Fig. 7, the moto'r M placed at the side of the driver controls directly the axle F by means of a single strap G which may be inclosed in a metallic sheath applied on the locomotive A; any other equivalent arrangement can be employed for the same object.

It will be understood that I do not limit myself to the particular forms and arrangements of the apparatus represented by way of'example on the annexed drawings, and thus, for instance, the arrangements and agencies of motors M can be varied according to each case, and they can be actuated as desired by steam, compressed air, or electricity.

I declare that what I claim is 1. In order toeftect the draft of a locomotive the combination with one "or more drawing blowers, directing the heated gases from the'si'noke nox df an axle consisting of two parts connected by a 'coup1i-'n g allowing acerta-in side p'layof these parts in their bearings, as has been explained above. I 2. In order to effect the'draft of a l'oco'motiv'e; two blowers "snchfas V-,-"a hol'low axle fsr'ich "a's F, co'ntr'olled by two motors such as M and a turbine such "as d mounted on one of the extremities of this hollow axle and causing a rapid current of cold water, 'as has been herei'nb'efo're explained and shown.

In testimony whereof I have signed 'my name to this specification in the presence of two 'siibsc'ribin g witnesses.

, JEAN PIERRE SERVE.

Witnesses:

EUGENE LooIs DUMA's, CHARLES PIERRE BAILLY. 

